וּמֵחֲצִי֙ מַטֵּ֣ה מְנַשֶּׁ֔ה שְׁמוֹנָ֥ה עָשָׂ֖ר אָ֑לֶף אֲשֶׁ֤ר נִקְּבוּ֙ בְּשֵׁמ֔וֹת לָב֖וֹא לְהַמְלִ֥יךְ אֶת־דָּוִֽיד׃ (ס)
And of the half-tribe of Manasseh eighteen thousand, who were mentioned by name, to come and make David king.
Read kabbalistic (mystical) interpretation of I Chronicles 12:32: and classical mystical sources.